27th May 2025

A 4-year-old girl is brought into the ED after her parents have found her to be increasingly lethargic with a worsening rash.

A 4-year-old girl is brought into the ED after her parents have found her to be increasingly lethargic with a worsening rash. On examination she has a fever, widespread purpuric rash and mucosal hyperpigmentation. Her observations show she is hypotensive and hypoglycaemic. Initial blood tests show a prolonged prothrombin time, reduced platelets and fibrinogen. Which of the following organisms is the most likely cause of her presentation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.